42151340 has 96 divisors (see below), whose sum is σ = 111863808. Its totient is φ = 12960000.

The previous prime is 42151337. The next prime is 42151349. The reversal of 42151340 is 4315124.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (42151349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155405 + ... + 155675.

It is an arithmetic number, because the mean of its divisors is an integer number (1165248).

Almost surely, 2^42151340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42151340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55931904).

42151340 is an abundant number, since it is smaller than the sum of its proper divisors (69712468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42151340 is a wasteful number, since it uses less digits than its factorization.

42151340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 42151340 is about 6492.4063335561. The cubic root of 42151340 is about 348.0196734375.

Adding to 42151340 its reverse (4315124), we get a palindrome (46466464).

It can be divided in two parts, 4215 and 1340, that added together give a palindrome (5555).

The spelling of 42151340 in words is "forty-two million, one hundred fifty-one thousand, three hundred forty".